Improvement in bobbin-winders for sewing-machines



G; A. BRADY.

improvementjn Bobbin-Winders for Sewing-Machines N0. 126,925. PatentdMay 21,1872.

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GILBERT A. BRADY, or oHIoAco, ILLINoIs.

IMPROVEMENT IN BOBBlN-WINDERS FOR SEWING-MACHINES.

Specification forming part of Letters Patent No. 126,925, dated May 21,1872.

To all whom it may concern:

'Be it known that I, GILBERT A. BRADY, of Chicago, in the county of Cookand State of Illinois,have invented. a new and Improved Bobbin-Winder;and I do hereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accomments on deviceswhich are designed for winding thread on shuttle-bobbins, as will behereinafter explained.

The following description of my invention will enable others skilled inthe art to underderstan'd it.

The frame of the device consists of a horizontal bed, A, rising fromwhich are standards b b, which afl'ord bearings for a center-bar, c, andspindle 0. By means of an oblong tenon, a, on the bottom of the bed A,and a bindingscrew, which is passed through a slot, a, and

into the table of the sewing-machine, the device is secured fast inproper position for operation. The bobbin 0 is constructed withcenter-points on its extremities, and on one end lugs are formed. Thisbobbin is confined between a center-bar, c, and a spindle, e, as shownin Fig. 1. The center-bar c is allowed to receive end-play, and is heldup to the center-point of the bobbin by means of a spring, 0, which iscoiled aroundit between the bifurcated ends of the standard 12. Torelease the bobbin a gravitating-cam, d, is applied to the outer end ofthe center-bar 0. By turning up the loaded arm of this cam the bar 0will be moved outward and the bobbin 0 will drop from its bearings. Thespindle c has a lug formed on its inner end, as shown in Fig. 1, which,by contact with one or the other of the lugs on the bobbin, will causethe latter to rotate with the spindle. The spindle has its hearing inthe tubular portion of the standard b, and is prevented from receivingendwise-play by means of a transverse pin, l, which intersects a groovein the spindle. On that part of the spindle c which is exposed beyondthe outer end of its bearing a thumb-piece, g, a friction-wheel, f, anda spring, 0 are applied. The thumb-piece g has applied to it atrippingpin, '1', which passes through an elevation on top of thetubular bearing of spindle e, and, during the winding of thread on the.bobbin, bears against one end of a vibrating presser, ID, as shown inFig. 2. The wheel f presents a friction surface, and is applied on thespindle e by means of a tenon and groove, which prevent this wheel fromturning on its spindle, but allow it to be moved endwise thereon. Thespring 6 is compressed between the head 6 of the spindle and the wheelf, .so that when the presser is moved backward to the position indicatedin Figs. 1 and 3 the wheel f will assume the position indicated in thesefigures. The vibrating presser D is T-shaped, and is pivoted by itslower end to a horizontal bar, E, and acted on by a spring, .9. Theupper portion or T-head of this presser is somewhat longer than thebobbin 0, but that portion which impinges against the thread on thebobbin'is of such width as to be received between the heads ofthebobbin. S represents the vertical rod on which the spool T isapplied. B represents a rod, which is provided with fixed thread-guidest t and a horizontal vibrating thread-guide, t.

The device above described is secured to a sewing-machine, such, forinstance, as the Singer Family machine, in such relation to thefly-wheel thereof that when the frictionwheel f is moved outward, asindicated in Fig. 2, its periphery will press against said flywheel andbe turned thereby. When the wheel f is moved into this working positionthe pin 0* is also moved outward so as to allow the spring a to forcethe presser against the bobbin. The winding is now proceeded with, andas course after course of thread is wound on the bobbin the presser isslowly moved back by these courses until, finally, when the last course.is wound on the bobbin, the pin 0 is released and the spring 0 allowedto move the wheel f away from the fiy-wheel which turned it. In this wayand by these means the winding is stopped automatically at the momentthe bobbin is filled.

In order to adapt the device to sewing'machine fly-wheels which rotatefrom the operatoror, in other words, which rotate in adirection oppositeto the Singer machine referred to-a rod, 1), is applied below the spindie and center-bar, and secured to the standards b I) parallel to theaxis of the bobbin when confined in its proper place between the ends ofsaid spindle and center-bar. Around this rod 1) the thread is carried onits way from the arm t to the spindle, so that, although the latter isrotated in a direction opposite to that indicated in Fig. 3 by thearrow, the thread will be wound on it in a proper manner.

Having described my invention, whatI claim as new, and desire to secureby Letters Pat ent, is-

1. The tripping-pin r and presser D, in combination with thei'riction-wheelf and spring 0 substantially as described.

2. The thumb-piece g, receivin g freely through it the spindle c, andserving as a means for adjusting the pin 0', in combination with thepresser D, substantially as described.

3. The rod 71, arranged as described, and combined with the devicesherein set forth.

4. The gravitating cam r], in combination with the spindle c,substantially as described.

GILBERT A. BRADY.

Witnesses:

E. D. SWAN, W. S. SWAN.

